Mr. Obama was also scheduled to hold a campaign event in Winter Park, Fla., later on Friday. The campaign told CBS News that event has been canceled.

Both First Lady Michelle Obama's and Ann Romney's scheduled events have been canceled.

Romney campaign spokeswoman Andrea Saul said in an email that
the Republican candidate will address the shooting at his campaign event
in Bow, N.H., though the campaign adds his event will not be a "typical
campaign event" and he'll just be addressing the tragedy.

Meantime, the Obama campaign told CBS News that they have asked Colorado TV stations to stop running ads attacking Romney "for the time being." The campaign adds, "It takes time for stations to be able to do this, but we are making every effort."

The Romney campaign also said in an email that they're "pulling all ads in CO until further notice."

Earlier Friday morning, President Obama made the following statement on the Colorado movie theater shooting:

"Michelle and I are shocked and saddened by the horrific and tragic shooting in Colorado. Federal and local law enforcement are still responding, and my Administration will do everything that we can to support the people of Aurora in this extraordinarily difficult time. We are committed to bringing whoever was responsible to justice, ensuring the safety of our people, and caring for those who have been wounded. As we do when confronted by moments of darkness and challenge, we must now come together as one American family. All of us must have the people of Aurora in our thoughts and prayers as they confront the loss of family, friends, and neighbors, and we must stand together with them in the challenging hours and days to come."

And Mitt Romney made the following statement on Friday morning's shooting:

"Ann
and I are deeply saddened by the news of the senseless violence that
took the lives of 15 people in Colorado and injured dozens more. We are
praying for the families and loved ones of
the victims during this time of deep shock and immense grief. We
expect that the person responsible for this terrible crime will be
quickly brought to justice."

Gov. John Hickenlooper, D-Colo., released this statement:

"This is not only an act of extreme violence, it is also an act of depravity. It is beyond the power of words to fully express our sorrow this morning. Our prayers and condolences go first to the families of those killed, and we share the grief of everyone affected by this senseless event. We appreciate the swift work by local, state and federal law enforcement. Coloradans have a remarkable ability to support one another in times of crisis. This one of those times."

Sen. Mark Udall, D-Colo., released this statement:

"I am deeply saddened and outraged by these senseless and tragic shootings," Udall said. "My thoughts go out to the families and friends of those killed, and I am praying for a speedy recovery for those who were wounded. My staff and I are in close contact with officials on the ground and will offer any federal resources needed to investigate this terrible crime and bring those responsible to justice."

Sen. Michael Bennet, D-Colo., said in a statement:

"This was horrible, senseless and abhorrent act. My family and I are shocked and deeply saddened this morning and our hearts are with the victims and their families. My staff and I are in contact with and offering our support to law enforcement and medical officials as they respond to the shooting."

Rep. Mike Coffman, R-Colo., whose district includes Aurora, the site of the shooting, released this statement:

"My thoughts and prayers go out to all of the victims and their families in this senseless act of violence. I've lived in Aurora almost all of my life and nothing like this has ever happened here. This was the type of violence that I would have expected when I served in Iraq with the U.S. Marine Corps but never here at home."